Important Things To Stress
- The receiving end of the light transmission must be located at a higher gravitational potential in order for gravitational redshift to be observed. In other words, the observer must be standing "uphill" from the source. If the observer is at a lower gravitational potential than the source, a gravitational blueshift can be observed instead.
- Tests done by many universities continue to support the existence of gravitational redshift.
- Gravitational redshift is not only predicted by general relativity. Other theories of gravitation require gravitational redshift, although their detailed explanations for why it appears vary. (Any theory that includes conservation of energy and mass–energy equivalence must include gravitational redshift.)
- Gravitational redshift does not assume the Schwarzschild metric solution to Einstein's field equation – in which the variable cannot represent the mass of any rotating or charged body.
Read more about this topic: Gravitational Redshift
Famous quotes containing the words important things, important and/or stress:
“The three most important things a man has are, briefly, his private parts, his money, and his religious opinions.”
—Samuel Butler (18351902)
“Minimize, eliminate, delegate, and routinize. Decide whats important and forget the rest”
—Donna N. Douglass (20th century)
“While ... we cannot and must not hide our concern for grave world dangers, and while, at the same time, we cannot build walls around ourselves and hide our heads in the sand, we must go forward with all our strength to stress and to strive for international peace. In this effort America must and will protect herself.”
—Franklin D. Roosevelt (18821945)